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- /* Routines for AX.25 encapsulation in KISS TNC
- * Copyright 1991 Phil Karn, KA9Q
- */
- #include "global.h"
- #include "mbuf.h"
- #include "iface.h"
- #include "kiss.h"
- #include "devparam.h"
- #include "slip.h"
- #include "asy.h"
- #include "ax25.h"
-
- /* Send raw data packet on KISS TNC */
- int
- kiss_raw(iface,data)
- struct iface *iface;
- struct mbuf *data;
- {
- register struct mbuf *bp;
-
- /* Put type field for KISS TNC on front */
- if((bp = pushdown(data,1)) == NULLBUF){
- free_p(data);
- return -1;
- }
- bp->data[0] = PARAM_DATA;
- /* slip_raw also increments sndrawcnt */
- slip_raw(iface,bp);
- return 0;
- }
-
- /* Process incoming KISS TNC frame */
- void
- kiss_recv(iface,bp)
- struct iface *iface;
- struct mbuf *bp;
- {
- char kisstype;
-
- kisstype = PULLCHAR(&bp);
- switch(kisstype & 0xf){
- case PARAM_DATA:
- ax_recv(iface,bp);
- break;
- default:
- free_p(bp);
- break;
- }
- }
- /* Perform device control on KISS TNC by sending control messages */
- int32
- kiss_ioctl(iface,cmd,set,val)
- struct iface *iface;
- int cmd;
- int set;
- int32 val;
- {
- struct mbuf *hbp;
- char *cp;
- int rval = 0;
-
- /* At present, only certain parameters are supported by
- * stock KISS TNCs. As additional params are implemented,
- * this will have to be edited
- */
- switch(cmd){
- case PARAM_RETURN:
- set = 1; /* Note fall-thru */
- case PARAM_TXDELAY:
- case PARAM_PERSIST:
- case PARAM_SLOTTIME:
- case PARAM_TXTAIL:
- case PARAM_FULLDUP:
- case PARAM_HW:
- if(!set){
- rval = -1; /* Can't read back */
- break;
- }
- /* Allocate space for cmd and arg */
- if((hbp = alloc_mbuf(2)) == NULLBUF){
- free_p(hbp);
- rval = -1;
- break;
- }
- cp = hbp->data;
- *cp++ = cmd;
- *cp = val;
- hbp->cnt = 2;
- slip_raw(iface,hbp); /* Even more "raw" than kiss_raw */
- rval = val; /* per Jay Maynard -- mce */
- break;
- case PARAM_SPEED: /* These go to the local asy driver */
- case PARAM_DTR:
- case PARAM_RTS:
- rval = asy_ioctl(iface,cmd,set,val);
- break;
- default: /* Not implemented */
- rval = -1;
- break;
- }
- return rval;
- }
-